What does a schema compatibility report prove?

Last updated: 2026-07-31

Written and reviewed by Seller Profit Guard Editorial Team.

It proves only that the entered header and type contract meets the declared compatibility rules. It cannot prove row values, order counts, money totals, unique keys, privacy compliance, accounting treatment, tax treatment, platform correctness, or safe production processing. Use Ready as permission for the next protected validation gate, not final approval.

interpretation worksheet from expected and observed headers through required type alias version and restoration controls — This original diagram explains a defensible next action with invented header-only contracts.

Read compatibility classification first

Distinguish exact, additive, aliased, review-required, and incompatible outcomes. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 1, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Inspect required omissions

One missing required header outweighs a high percentage of matching optional fields. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 2, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Inspect type mismatches by consequence

Required monetary, date, key, and status fields deserve stricter treatment than unused optional fields. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 3, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Read alias count with the map

A count of one is useful only when the exact source and target are present and unique. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 4, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

interpretation worksheet: read alias count with the map — This original diagram makes a defensible next action reviewable without private rows or production processing claims.

Read additions with approval state

Allowed and unreviewed additions have different parser and privacy implications. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 5, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Use age as a review trigger

Contract age signals when to refresh evidence; it does not prove drift occurred. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 6, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Keep schema and data conclusions separate

A clean header contract cannot validate nulls, values, counts, totals, duplicates, or joins. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 7, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Choose the next protected action

Ready advances to row validation; Review assigns evidence work; Block stops processing and restores. The interpretation worksheet records the export family, row grain, expected and observed labels, semantic types, required status, additions, aliases, dates, source fingerprint, consumer, owner, reviewer, output hash, stop rule, and prior accepted contract needed for a defensible next action.

At checkpoint 8, state the exact pass condition, rejected shortcut, affected automation, protected evidence pointer, correction deadline, monitoring signal, and restoration trigger. Keep header compatibility separate from row values, counts, totals, privacy, accounting, tax, and production authority.

Read a Schema Compatibility Report Correctly: identity integrity control

Tie the contract to one exact export family, acquisition path, row grain, delimiter, encoding, and fingerprint. Control 1 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

A .csv extension is not source identity. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

Read a Schema Compatibility Report Correctly: lookup integrity control

Tie every required field to one unique expected or approved aliased observed name. Control 2 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

A nearest label or column position is not a reviewed mapping. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

Read a Schema Compatibility Report Correctly: type integrity control

Tie every consumer to declared expected and observed semantic types plus explicit normalization rules. Control 3 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

A spreadsheet display is not protected value validation. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

interpretation worksheet: read a schema compatibility report correctly: type integrity control — This original diagram makes a defensible next action reviewable without private rows or production processing claims.

Read a Schema Compatibility Report Correctly: privacy integrity control

Keep public fixtures header-only and invented while operational rows remain protected and minimized. Control 4 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

Compatibility is not privacy certification. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

Read a Schema Compatibility Report Correctly: human authority control

Assign export, contract, privacy, automation, review, stop, and restoration owners. Control 5 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

Ready cannot run or rewrite production data. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

Read a Schema Compatibility Report Correctly: rollback integrity control

Preserve prior contracts, parsers, aliases, fixtures, outputs, exceptions, backups, and tested restoration. Control 6 defines the source, invariant, reviewer question, accepted evidence, exception state, stop authority, and restoration proof for a defensible next action.

Never overwrite the only accepted schema history. Keep schema checking separate from file upload, row validation, column mapping, date normalization, order matching, monetary reconciliation, privacy approval, platform correction, and unattended execution.

Read compatibility classification first: counterexample lab 1

Reperform both invented contracts. Distinguish exact, additive, aliased, review-required, and incompatible outcomes. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Test exact, allowed-additive, approved-alias, optional-missing, unreviewed-addition, required-missing, optional-type, required-type, duplicate, alias-collision, stale-version, impossible-date, short-context, weak-scope, and open-conflict states. Every example remains header-only and invented.

Inspect required omissions: counterexample lab 2

Reperform both invented contracts. One missing required header outweighs a high percentage of matching optional fields. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Inspect type mismatches by consequence: counterexample lab 3

Reperform both invented contracts. Required monetary, date, key, and status fields deserve stricter treatment than unused optional fields. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Read alias count with the map: counterexample lab 4

Reperform both invented contracts. A count of one is useful only when the exact source and target are present and unique. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Read additions with approval state: counterexample lab 5

Reperform both invented contracts. Allowed and unreviewed additions have different parser and privacy implications. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Use age as a review trigger: counterexample lab 6

Reperform both invented contracts. Contract age signals when to refresh evidence; it does not prove drift occurred. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Keep schema and data conclusions separate: counterexample lab 7

Reperform both invented contracts. A clean header contract cannot validate nulls, values, counts, totals, duplicates, or joins. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Choose the next protected action: counterexample lab 8

Reperform both invented contracts. Ready advances to row validation; Review assigns evidence work; Block stops processing and restores. Change one header, type, required flag, allowed addition, alias, version date, grain, delimiter, encoding, context, or declared conflict only; preserve every other assumption and record compatibility, counts, decision, issue, owner, and rollback.

Read a Schema Compatibility Report Correctly: intent-specific implementation walkthrough

interpretation worksheet checkpoint 1 addresses read compatibility classification first for a defensible next action. Distinguish exact, additive, aliased, review-required, and incompatible outcomes. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 2 addresses inspect required omissions for a defensible next action. One missing required header outweighs a high percentage of matching optional fields. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 3 addresses inspect type mismatches by consequence for a defensible next action. Required monetary, date, key, and status fields deserve stricter treatment than unused optional fields. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 4 addresses read alias count with the map for a defensible next action. A count of one is useful only when the exact source and target are present and unique. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 5 addresses read additions with approval state for a defensible next action. Allowed and unreviewed additions have different parser and privacy implications. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 6 addresses use age as a review trigger for a defensible next action. Contract age signals when to refresh evidence; it does not prove drift occurred. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 7 addresses keep schema and data conclusions separate for a defensible next action. A clean header contract cannot validate nulls, values, counts, totals, duplicates, or joins. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

interpretation worksheet checkpoint 8 addresses choose the next protected action for a defensible next action. Ready advances to row validation; Review assigns evidence work; Block stops processing and restores. Record the accepted contract, rejected alternative, source version, affected consumer, reviewer, follow-up date, monitoring trigger, and rollback reference.

For a defensible next action, require exact type coverage for every present header, strict whole-number age, header-count and evidence-duration thresholds, real source-review and policy dates, and all nine release confirmations. The evidence month must contain every observed export, the review must cover the latest observation, the policy must predate or equal the earliest expected contract, and the inclusive contract-to-observation span must meet the stated minimum. When this interpretation worksheet Blocks, quarantine every compatibility class, count, alias, addition, omission, type mismatch, and age output as Unavailable until the contract is repaired and independently reviewed.

Evidence boundary for a defensible next action

The additive fixture expects five headers and observes six after Risk Level is added as an allowed text field. The rename fixture resolves Created at to Order created at through one reviewed alias. Both preserve required coverage, declared types, valid 19-day contract age, owners, review, backup, and restoration evidence.

These invented header contracts demonstrate deterministic compatibility rules only. They cannot prove row values, order counts, amounts, unique keys, completeness, buyer privacy, accounting treatment, tax treatment, platform correctness, or permission to run, import, export, retain, transform, or overwrite operational data.

Release, monitor, and restore the interpretation worksheet

Block required omissions, required type drift, duplicate normalized names, malformed pair declarations, ambiguous aliases, impossible version order, weak governance, or open conflicts. Review optional drift, unreviewed additions, optional omissions, or contract age beyond the declared limit. Ready clears only exact, allowed-additive, or approved-alias compatibility.

Before indexing or operational reuse, preserve backups and pass type, unit, integration, build, content, similarity, SEO, image, link, privacy, mobile, deployment, and live checks. Monitor source fingerprints, headers, types, grain, counts, consumer exceptions, and restoration readiness without claiming same-day traffic or business causality.

Sources and further reading

Etsy Help: download sold transactions: Official Etsy seller CSV export families and example fields.
Etsy Help: download Etsy data: Official distinction between privacy downloads, order exports, shop settings, and reviews.
Shopify Help: exporting orders: Official order-export and transaction-history structures, multi-line rows, documented headers, and deprecated fields.
Seller Profit Guard methodology: Deterministic fixtures, source precedence, release, correction, monitoring, and rollback.

Related Seller Profit Guard tools

Marketplace Export Schema Checker: Run the browser-local invented-header compatibility worksheet.
CSV Import Validator: Use a separate import-readiness gate after schema compatibility.
Seller CSV Column Mapper: Map only fields cleared by the schema contract.
Seller CSV Privacy Redactor: Minimize the approved schema before protected processing.
Methodology: Review evidence, correction, release, monitoring, and rollback.
Data Privacy: Keep operational rows and buyer data out of public fixtures.
Export Schema Contract: 9 Inputs Before Automation: Define expected and observed headers, types, required fields, aliases, additions, version dates, row grain, and rollback before automating an export.
Export Schema Checker Example: One Added Column: Work a complete export schema example where an optional field is added without breaking a name-based parser or exposing seller rows.
Required Column Renamed: Controlled Alias Example: Handle a renamed required export column with an explicit one-to-one alias, affected-consumer tests, version evidence, and rollback.
11 Export Schema Checks That Fail Quietly: Diagnose schema-check mistakes involving normalization, duplicates, aliases, types, row grain, versions, privacy, and false compatibility.
Export Schema Evidence Without Sharing Private Rows: Build a reliable source register for expected contracts, observed header fingerprints, types, versions, consumers, privacy, and restoration.
Ready, Review, or Block for Schema Drift: Define decision thresholds for additive fields, optional omissions, type changes, required fields, aliases, version age, and governance gaps.
Added Column vs Renamed Required Column: Compare additive and rename drift at the same contract grain so field count, required coverage, aliases, and consumer risk remain visible.
Weekly Export Schema Drift Routine: Turn schema compatibility into a recurring header-fingerprint, consumer-test, exception, monitoring, and restoration workflow.
Export Schema Audit Checklist and Change Log: Provide a reusable audit checklist and dated change log for source fingerprints, contracts, aliases, consumers, exceptions, approvals, and rollback.

Next step: Open Seller Profit Guard.

This is operational planning help, not tax, accounting, legal, financial, or platform-policy advice. Review the Terms and disclaimer, and verify current platform rules and fee assumptions before changing prices.